Range with ventilating hood



Aug. M, 1951 H. WARREN RANGE WITH VENTILATING HOOD 2 Sheets-Sheet 1Filed May 22, 1948 o oo INVENTOR. HARRY L. WARREN Aug. M, 1951 H. L.WARREN RANGE WITH VENTILATING HOOD 2 sheets-S t 2 Filed May 1948 HARRYL. WARREN Z;

Patented Aug. 14, 1951 UNITED- STATES PATENT OFFICE 2,564,087 RAN GE.WITH VENTILATINGt HOOD Harry' L. Warren, South Pasadena, Calif.-, as-

signor to Southern California Gas Company; Los Angeles, Calif acorporation of California Application May 22, 1948; SeriaLNo...28\,661

an exhaust fan associated with the ventilating hood:v may be in.operation or out. of operation without appreciably altering thecombustion performance of the range'or cooking compartments.

Second, to provide a ventilating hood and conduit system so arrangedthat a minimum of condensation of cooking vapors, particularly oils andgreases, occurs within. the conduit system, there being providedrelatively large exposed and easily cleaned areasat the back of therange. and under the ventilatinghood on. which a substantial proportionof. such. vapors tend to condense.

Third, to provide a ventilating range hood which affords-a heated shelfto' warmv dishes and food.

Fourth, to. provide a ventilating range hood which, when the exhaust fanis out of opera tion,. permits discharge of the heat: from the range andopen cooking: area into. the kitchen for space heating purposes;

Fifth, to provide a ventilating range hood whichrequires' only a.relatively small capacity exhaust fan so that thereis a minimuminterference with winter or summer airconditioning systems and a minimumconsumption of electrical energy;

With the above and other objects in view, reference is directed-- to theaccompanying drawings in which:

Figure 1 is a front view of a stove equipped with my ventilating hood.

Figure 2 is a side view thereof;

Figure 3 is a top view' thereof with portions of the ventilating hoodbroken away to facilitate the illustration.

Figure 4' is a back'view thereof also with portions of" the ventilatinghood broken away and showing the stove asinstalled and provided with an.exhaust system.

Figure 5 is a fragmentary sectional. view through 5-5' of'Figure 4, thestove being shown:

substantially diagrammatical.

Figure. 6 is a fragmentary sectional view through. 6.6 of Figure 4.

Figure. '7 is a. fragmentary sectional viewthrough. 1l of'Figure 6.

My ventilating, hood; is adapted for installation. onarange I which.comprises a range; top or. opencooking area. 2,.having burners 3,preferably arranged. along the. rear portion. The

range is provided withone or more closed cooking compartmentsltl, such.as a broiler. and oven.v

My ventilating hood structure includes a back. panel 5. which extendsvupwardly from the rear margin. of. the open. cooking area and isprovided. with sideflanges o continuing from the.

side wallsof theranger The back. panel. is. provided. with a top. ledge1.. the back. panel. may curve. forwardly, as. indi cated by 8.

One. or. more ducts 9.. each. intersect the top ledge 1 and extenddownwardly to vent-boxes I0, located.-rearwardly of the closed cookingcompartments. the. cooking. compartments, vent ducts,.and. with respectto. the ventilating. hood structure, are intake. ducts. Each vent boxcovers. an. open.-

ing- H- communicating with the; corresponding;

closed cooking compartment. The ventv box. is. open at its under side,as indicated by l2;

Also intersecting the. top ledge 1 is. a. down-- Wardly extendingexhaust duct I3 which. com.- municates with the intake side ofanexhaust. fan.

l4.. The exhaust fan and a suitable drivingmo tor, not shown,.may bemountedin a specialcompartment below one of the. closed. cookingcompartments. The exhaust. fan is provided with a discharge duct l5which. passes downwardly through the floor. on whichtherange sits andinto a suitablelateral pipe.

The back. panel ii supports a hood or hollowv shelf structure [6,.theupper side of'which forms a shelf surface. Thehood structure includesside walls I1 continuing from the side flanges E of the back panelandaback wall 18 connecting the rear extremities of the side walls 11. Theforward margin of'the hood structure curves downwardly to. form a flangeor lip !9. structure is a main bafile 20 in the form of a plate, therear portion of which is bent downwardly, forming a vertical wall 2!,and then extends horizontallyto reston the topledge 1. The- Adjacent.the ledge.

The. ducts 9.- are, with respect. to.

Within the hood which rests on the ledge I is provided with an openingcommunicating with the exhaust duct.

Disposed under the main bafile 20 is a second baffle 23 in the form of aplate, the rear portion of which rests on the top flange I forwardly ofthe ducts 9 and I3, the forward portion of which is bent upwardly thenforwardly to form an angular lip 24. The vertical wall 2| of the mainbafile is provided with offset portions 25 which overlie the entrance tothe vent ducts 9 and communicate with the space between the baffles 28and 23.

The lip 24 of the secondary bafile 23 forms, with the under side of thebafile 28, an outlet opening or slot 26 which communicates through adistributor chamber 21 defined by the bafiles and through the offsetportions 25 to the vent ducts 9. The forward edge of the main baflie 28forms with the forward margin of the hood structure an inlet opening orslot 28 which communicates through a distributor chamber 29 with thexhaust duct I3.

Operation of the ventilating hood is as follows:

When the closed cooking compartments are in operation, and the exhaustfan is functioning, gases and vapors issuing from the outlet ll of aclosed cooking compartment flow upwardly through duct 9, forwardlythrough chamber 21 and issue from the outlet 26. A negative pressureexists at the inlet 28; consequently the gases and vapors tend to remainwithin the boundaries of the hood structure [6 and flow into the inlet28 and pass through the distributor chamber 29 to the exhaust duct l 3.

Irrespective of operation of the closed cooking compartments, vapors andgases from the open burners 3 pass upwardly to the exposed portions ofthe bafiies 23 and 20 and are drawn into the inlet 28. If the exhaustfan is not functioning, the vapors from the open cooking compartments orfrom the closed cooking compartments, upon engaging the hood structure,flow outwardly around the margins thereof.

It should be noted that there is no direct connection between theexhaust duct and the closed cooking compartments so that under nocondition can an excessive suction pressure be applied to the closedcooking compartment. Tests have established the fact that thecombustion'performance of the closed cooking compartments is notappreciably affected by the operation of the exhaust fan; that is, thecombustion performanc is constant whether the exhaust fan is inoperation or not, and furthermore the capacity of the eX- haust fan mayvary over a wide range without appreciably affecting .the combustionperformance of the closed cooking compartments.

It will be observed that by reason of the open ing l2 under each ventbox l0, gases from the closed cooking compartment are free to fiowdownwardly and out should a back pressure exist in the ducts 9 so thatthe oven or broiler may be operated irrespective of the conditions ofthe ventilating hood or associated exhaust system.

The exposed surfaces of the back panel and exposed under sides of thebafile 20 and hood [6 are smooth and easily cleaned. These surfacesserve to collect for ready removal some of the solids which mightotherwise collect in the duct I3.

Many other embodiments of the invention may be resorted to withoutdeparting from the spirit of the invention.

I claim:

1. The combination with a kitchen range having top burners and at leastone closed cooking compartment, of a ventilating range hood, comprising:an upright structure adapted for installation at the rear of the kitchenrange and having an intake duct communicating with said closed cookingcompartment and an exhaust duct communicating with an exhaust system; ahollow shelf structure mounted on said upright structure and extendingforwardly thereof over the top burners of said range, the under side ofthe forwardly extending portion of said shelf structure being open; abafile within said hollow shelf structure, said bafile defining with theupper extremity of said upright structure a passageway communicatingwith said intake duct, and defining with said hollow shelf a passagewaycommunicating with said exhaust duct, said baffle terminating short ofthe forward extremity of said shelf to permit flow of gases forwardlyunder said bafile from said intake duct then rearwardly through saidpassageway to said exhaust duct.

2. The combination with a range having an open cooking area and anenclosed cooking compartment of a ventilating hood comprising: anupright panel adapted for attachment to the range at the rear of itsopen cooking area, ducts rearwardly of said panel adapted forcommunication respectively with said closed cooking compartment and aregion of reduced pressure; a hollow shelf structure mounted on saidupright panel and defining at its under side a rearward outlet openingcommunicating with the duct,

communicating with said closed cooking compartment and a forward inletopening communicating with the duct leading to the region of reducedpressure, whereby vapors issuing from said outlet opening tend to flowforwardly along the underside of said shelf to said inlet opening, andvapors arising from said opening cooking area are likewise drawn intosaid inlet opening.

3. The combination with a range having an open cooking area and anenclosed cooking compartment of a ventilating structure comprising: anupright back panel structure including a first duct connected to asource of negative pressure, a second duct connected to said enclosedcooking compartment, said ducts terminating at the upper end of saidback panel structure; a hood adapted to be positioned with its rearwardmargin overlying said panel, said hood having depending side walls; amain bafile under said hood within the side walls, said main bafiledefining with the forward wall of said hood an inlet opening, and withthe top of said hood a passageway communicating with said first duct; asecond bafile defining with said main bafile an outlet rearwardly ofsaid inlet opening and a passageway communicating with said second duct;the underside of said main bafile being exposed to the open cooking areabetween said outlet and inlet opening and tending to direct vaporsissuing from said outlet and vapors arising from said open cooking areato said inlet opening.

4. The combination with a range having an open cooking area and anenclosed cooking compartment of a ventilatingstructure comprising: ahood having depending marginal walls; a main bafile disposed under saidhood within said walls to define with said hood an intake openingadjacent the forward wall of said hood, and a distributor chamberrearwardly thereof; a secondary baffie forming with said main bafile anoutlet opening rearwardly of said intake opening and a seconddistributor chamber rearwardly thereof; an exhaust duct connecting saidintake opening and first distributor chamber with a source of nega- 5tive pressure; an intake duct connecting said outlet opening and seconddistributor chamber with said enclosed cooking compartment; said mainbafile being exposed between said outlet opening and intake opening andtending to direct vapors issuing from said outlet opening and vaporsarising from said open cooking area to said intake opening.

HARRY L. WARREN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Name Date Amos July 26, 1898 Number Number 15Number

